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Finding the Fourth Proportional to 390,574.51, 538,987.97 and 229,444.25

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Solution

The fourth proportional to 390,574.51, 538,987.97 and 229,444.25 is: 316,630.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,574.51 : 538,987.97 = 229,444.25 : x
  2. Step 2: Convert to fraction form
    390,574.51/538,987.97 = 229,444.25/x
  3. Step 3: Cross multiply
    390,574.51x = 538,987.97 × 229,444.25
  4. Step 4: Simplify right side
    390,574.51x = 123,667,688,414.34
  5. Step 5: Solve for x
    x = 123,667,688,414.34/390,574.51
  6. Step 6: Final answer
    x = 316,630.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.